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mac80211: drop check for DONT_REORDER in __ieee80211_select_queue

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When __ieee80211_select_queue is called, skb->cb has not been cleared yet,
which means that info->control.flags can contain garbage.
In some cases this leads to IEEE80211_TX_CTRL_DONT_REORDER being set, causing
packets marked for other queues to randomly end up in BE instead.

This flag only needs to be checked in ieee80211_select_queue_80211, since
the radiotap parser is the only piece of code that sets it

Fixes: 66d06c8473 ("mac80211: adhere to Tx control flag that prevents frame reordering")
Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20211110212201.35452-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Felix Fietkau 2021-11-10 22:22:01 +01:00 committed by Johannes Berg
parent c033a38a81
commit f6ab25d41b
1 changed files with 1 additions and 2 deletions
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3
net/mac80211/wme.c
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@ -143,7 +143,6 @@ u16 ieee80211_select_queue_80211(struct ieee80211_sub_if_data *sdata,
u16 __ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta, struct sk_buff *skb)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct mac80211_qos_map *qos_map;
bool qos;
@ -156,7 +155,7 @@ u16 __ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
else
qos = false;
if (!qos || (info->control.flags & IEEE80211_TX_CTRL_DONT_REORDER)) {
if (!qos) {
skb->priority = 0; /* required for correct WPA/11i MIC */
return IEEE80211_AC_BE;
}